How to Make Highlights Glow
The 'glare' for the bright parts should be able to be achieved with a Glare node in the compositor - set up the Threshold to ignore any parts that are not bright enough so as to get the effect on only the highlights.

However, for added configurability you could also add in the output of a Blur node as follows :



Adjust the Glare node, the Value nodes, and the Blur settings as desired.

Note the Subtract Mix node set to 'Clamp'. This effectively removes all but the highlights - so you only get blur of the particularly bright sections. The Multiply after the Blur allows you to control the strength of the 'haze' around those highlights. The RGB node allows you to adjust the color, to bring up the blue, for example.

Here's another example - with the effect over-emphasised for clarity :